Split rim



July 30, 1940. J WEBB 2,209,803

SPLIT RIM Filed April 1, 1939 Patented July 30, 1940 UNITED STATES PATENT OFFICE lclalm.

This invention relates to split rims for vehicles, and provides for maintaining each section of the rim structure in axial alignment with each other, and for protecting the assembly bolts from radial strains and shearing.

It is the purpose also of the invention to so distribute the bolt holes about one of the rim-' sections as to equalize the strains upon the studs and the bolts when the parts are assembled.

On the sheet of drawings, accompanying and forming a part of the specification,

Figure 1 is a fragmented view in section and in elevation showing the assemblythe axle arrangement being obviously omitted;

Figure 2 is a similar view with nuts and bolts removed, showing the parts separated to show the seat features of the invention, and

Figure 3 is a frontal view, substantially diagrammatic and partially broken away, and which shows the bolt hole disposition.

One section of the rim constitutes a formation including a casing head 4, a casing wall 5, a casing seat 6, a tube well wall I and a well seat 8.

To the inner side of this seat 8 is welded a collar 9 from which extends in an inwardly direction two flanges l0 and H, respectively, the latter being oifset with relation to the former, and inwardly of the rim section by a seat i2.

Each flange I0 and is provided with equidistantly disposed bolt holes l3 and I4, and these, in their respective equidistant arrangement are also relatively staggered for the purpose of equalizing the strain radially administered to the bolt-body passing into the holes.

The rim section thus described is applied to studs l5 protruding from the face of a drum i6 and which pass through the openings H of the flange H and this flange is held to the drum face by the nuts H.

An additional rim section is of formation providing a casing bead ill from which laterally extends a casing seat l9 and a well wall 20, and this wall extends inwardly and is formed into a flange 2| shaped for complementary registry with the formation of flange Ill and is provided with bolt holes It for the bolts 22 which pass through the flange l0, and by which, together with the nuts 23 the second section of the rim is held to the flrst section.

The flange 2i terminates in a lip 24 which underrides the under face of the seat l2 on the companion rim, and is held tightly inplace thereto by the bolts 22 and nuts 23.

This arrangement provides several important features, among the important of which is the axially aligned sections of the split rim, which insures an alignment of the casing seats 6 and. It, and the well walls I and 20. This provides 5 for the proper tractional stabilization of the casing and tends to forbid tractional inaccuracies in the traction of the casing, and case-torsion as well.

It is also to be observed that the interposition 10 of the seat l2, and the lip 24, between the bolts l5 and 22, and their positive fitting contact absorbs all of the radial strain and centrifugal expansion and thus forbids the transmission of either to any of the bolt-bodies, and this will 16 prevent bolt-body wearing or shearing, and thus preserve the axial alignment and balance of the rim-sections.

By staggering the equidistantly disposed sets of bolt holes l3 and M, for instance, as shown 20 in Figure 3, such radial strains as are produced during rotation of the rim, will be relatively equidistantly distributed,-and thus provide, not only for the constant contact of the face of the seat i 2, and the face of the lip 24, but will insure the g5 aforesaid alignment; the uni-axial position of the rim-sections, and the face alignment of the casing seats 6 and I9, as well as the well walls 7 and 20.

This will centralize the tread of the casing, 30 and forbid torsion in the casing walls, and this will produce the much desired tractional efliciency so much sought.

The flange 2i is provided with an offset 25, which furnishes a seat 28 for the reception of 35 the edge of a hub-cap 21, which may be held in place by the usual clips 28.

Having thus set forth the invention, I claim:

A disc wheel comprising two wheel sections to be secured together to form a rim well, a vehicle drum for supporting the same, means to secure said sections together, and means to secure them to said drum, one wheel section including a rim well base, a flange integral therewith and having two axially ofiset portions each with a set of 5 bolt holes, a centering wall formed intermediately of said bolt holes, a second wheel section applicable to the flrst section and including a second flange for engaging part of said first flange, and a centering lip extending at right 50 angles from said second flange in the direction of the first section and telescoping within said centering wall.

WADE J. WEBB. 

